Flywheel rotating tool



Dec. 12, 1950 BRUGMANN 2,533,762

FLYWHEEL ROTATING TOOL Filed June 7, 1946 2 Sheets-Sheet 1 Dec. 12, 1950 F. BRUGMANN 2,533,762

FLYWHEEL ROTATING TOOL Filed June 7, 1946 2 Sheets-Sheet 2 l K I frank ,Bragmanm,

INVENTOR.

Patented Dec. 12, 1950 FLYWHEEL ROTATING TOOL.

FrankBrugmann, Greeley, Clo., assignor qf'one; half to Raul Goss, Greeley, 0010.

Application June 7, 1946, Serial No. 675,045

4. Claims (01., 731.3,3)

This invention relates to tools for rotating the flywheels of automobile engines while the engines are being overhauled or repaired.

A main object of the invention is to provide a novel and improved flywheel rotating tool for internal combustion engines, said tool being very simple in construction, easy to use and efiicient/ in performance.

A further object of the invention is to provide an improved device to be used to turn the flywheel of an automobile engine while the mechanic is working underneath the engine, said. device being very useful to rotate the flywheel, when installing pistons, piston rings, adjusting bearings, and the like.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a front elevational view of the lower portion of an automobile internal combustion engine showing a flywheel rotating tool according to the present invention installed in position for use.

Figure 2 is a. cross-sectional view taken on line 2-2 of Figure 1.

Figure 3 is a side elevational view of a handle member employed, in the flywheel rotating tool of Figure 1.

Figure 4 is a bottom plan detail View of a mounting plate and spring bracket assembly employed in the flywheel rotating tool of Figure 1.

Figure 5 is a front elevational view similar to Figure 1, but showing a modification of the flywheel rotating tool,

Figure 6 is a cross-sectional view taken on line 6-6 of Figure 5.

Figure 7 is a view taken on line l'i of Figure 5.

Referring to the drawings, and more particularly to Figures 1 to 4, H designates the flywheel of a conventional automobile engine, said flywheel having the usual peripheral gear teeth 12 at its periphery. During the process of overhauling or repairing the engine it is very desirable for the mechanic to be able to rotate the flywheel, and accordingly, a tool for performing this rotation is provided, comprising a mounting bracket l3, consisting of a flat plate provided with a plurality of openings H! for securing the plate by bolts to various makes of cars adjacent the flywheels thereof, said openings being prelocated in accordance with available threaded apertures in said various makes of cars. Integrally formed on plate [3 are spaced parallel depending apertured lugs l5, l5, through which is pivotally mounted an arbor it carried and; projecting at right angles to an elongated ar-in- Il. Arm I1 is formed at its opposite end with another projecting arbor 18 which is parallel to arbor l6. Arbor l8 pivotally engages in; a bore l9 provided adjacent the upper end of a lever 23, said lever having outer guide bosses 2 2| through which bore l9 passes, whereby the bore is of substantial length.

The top end, of lever 28 is;formed;witha tooth element 22 adapted to gearingly engage in the space between adjacent gear teeth l2. The; depending lower portion of lever; 2011s employed; as an actuating handle torotate flywheel l t, bore I9 providing a fulcrum for thelever; action Tooth element 22 is, biased toward, meshing en gagement with. gear teeth, 52, by a; spring 2- 3 which encircles arbor l6 between lugs; lll, L5; and bears at one end on plate I53; and; is formed at its otherend with a hooked extension; em bracing arm l1; and biasing it upwardly.. It is readily apparent: that by rotating the depend, ing handle portion of lever 20: the flywheel; I l. may be rotated as required in either direction, spring 23 allowing the lever to be lowered be,- tween successive rotations, of, the. flywheel. to permit successive engagements ofr'tooth, element 22 with the gear teeth I2.

During use of the flywheel rotating device, arbors l6 and I8 are retained in operative position of cotter pins which are passed through the externally projecting ends of the respective arms.

Referring to the embodiment disclosed in Figr ures 5, 6 and 7, the actuating lever comprises a handle element 24 which is pivotally connected at its upper end to arbor [8 of arm I'l. Pivotally connected to the intermediate portion of element 24 is a piston rod 25 provided with a piston 26 which is received within a cylinder 21. The cylinder 21 is provided with a pressure gauge 28 which measures the air pressure developed in cylinder 21 by the force applied to piston 26 by handle element 24. Pivotally secured to cylinder 21 by a clevis 29 is an offset arm 30 formed at its upper end with a tooth element 3| adapted to mesh with gear teeth l2. Arbor l8 passes rotatively through the vertical portion of offset arm 30, thereby pivotally connecting said vertical portion of offset arm 30, thereby pivotally connecting said vertical portion to the upper end of handle element 24. When a force is applied to handle element 24 the magnitude of the force will be indicated by pressure gauge 28. This embodiment is useful in measuring the drag n bearings and for any other operation requiring the accurate determination of the amount of force applied to rotate the flywheel.

Any other well known type of force-measuring device may be interposed between handle element 24 and offset arm 30 instead of the piston and cylinder devic shown, within the spirit of the invention.

While certain specific embodiments of a flywheel rotating device have been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore it is intended that no limitations be placed on the invention other than as defined by the scope of the appended claims. What is claimed is: 1. A flywheel rotating device for motor vehicle engines comprising a bracket element adapted" to be secured to an engine adjacent the flywheel thereof, an arm pivotally secured to said bracket element, a lever member pivotally secured intermediate its end to said arm, a tooth element on one end of said lever member adapted to mesh with the gear teeth on the flywheel of the ngine, and a spring member engaging said arm and bearing on said bracket element, said spring member being formed and arranged to urge said arm and said tooth element toward the flywheel of an engine to which said bracket is secured.

2. A flywheel rotating device for a motor vehicle engine having a flywheel provided with peripheral gear teeth comprising a bracket attachable to the engine adjacent the flywheel thereof, an arm pivotally secured at one end to said bracket, a two-part lever pivotally secured to the opposite end of said arm, a tooth element carried by said lever at one end thereof engageable with the gear teeth on the engine flywheel, spring means operatively connected between said arm and said I bracket biasing said lever to engagement of 'said tooth element with the flywheel gear teeth, and force measuring means carried by said lever and operatively connected between the two parts thereof to measure the resistance of the flywheel to rotation.

3. A flywheel rotating device for a motor vehicle engine having a flywheel provided with pe- 4 ripheral gear teeth comprising a bracket attachable to the engine adjacent the flywheel there of, an arm pivotally secured at one end to said bracket, a first lever member pivotally secured intermediate its length to the opposite end of said arm, said first lever member having at one end a tooth element engageable with the gear teeth on the flywheel of the engine, a second lever member pivotally secured at one end to said opposite end of said arm, and a force measuring device interposed between the end of said first lever member remote from said tooth element and, said second lever member intermediate the length of the latter to measure the resistance of the flywheel to rotation.

4. A flywheel rotating device for a motor vehicle engine having a flywheel provided with peripheral gear teeth comprising a bracket attachable to the engine adjacent the flywheel thereof, an arm pivotally secured at one end to, said bracket, lever means pivotally secured to the opposite end of said arm, said lever means comprising a first lever pivotally secured intermediate its length to said arm, said first lever having at one end a tooth element engageable with the gear teeth on the flywheel of the engine, and a second lever pivotally secured at one end to said arm, a force measuring devic interposed between the end of said first lever opposite said tooth element and said second lever intermediate the length of the latter, and spring means operatively connected between said bracket and said arm urging said lever means to a meshing position of said tooth element with the flywheel gear teeth. FRANK BRUGMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Mitchell Mar. 21, 1939 

